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MR-DF3 Portable High-Precision Dynamic Gas Distribution Meter


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MR-DF3 Portable High-Precision Dynamic Gas Distribution Meter

MR-DF3 portable high-precision dynamic gas distribution meter is easy to carry and can be used for emergency gas distribution work. It can work continuously for more than 20 hours after power failure.

Equipment to realize dynamic gas distribution. The gas distribution part uses imported high-precision mass flow controllers to control the flow rates of multiple gas outputs in different proportions, thereby dynamically realizing the configuration of various gas concentrations. This instrument can be used to test a variety of technical indicators such as linearity, accuracy, and repeatability of gas analyzers. It is an indispensable test tool for calibration, maintenance, and repair of gas analysis instruments as well as a dilution device for fixed concentration gases.

It is suitable for calibration of gas analyzers used in factories, scientific research, laboratories and other units, and preparation of standard gas samples for testing.

    main feature

    • Complies with the relevant standards involving gas distribution instruments in HJ57-2017, HJ604-2017, and HJ38-2017, supports multi-channel gas mixing and distribution, and can distribute various concentration standard gases such as ppb level, ppm level, and percentage level;
    • It can be customized according to customer needs for dual-channel, three-channel, multi-channel and other composite gas distribution;
    • Use high-quality components such as high-precision stainless steel mass flow controllers and high-precision rotameter to ensure high system gas distribution accuracy and reliable quality;
    • Large LCD screen, the system runs more stably and the operation is easier;
    • Flow control adopts closed-loop fuzzy control technology, with fast response and accurate flow control;
    • Zero air pressure and cylinder air pressure can be monitored in real time to ensure that the air supply pressure meets the instrument requirements;
    • The gas path cleaning function in the system can ensure the accuracy of each gas distribution and the long life of the equipment;
    • No preheating time is required, gas distribution can be started when the machine is turned on;
    • Can be used portablely, with built-in lithium battery, which can work continuously for 20 hours.

    Application areas

    • etrology institutes at all levels
    • Certification agency
    • Laboratory
    • Scientific research and development
    • Manufacturer of detectors

    Technical Parameters

    Mass flow controller range

    Can be selected according to user needs

    Flow accuracy 


    Flow linearity


    Flow repeatability



    100:1(Can be customized as required)

    Maximum ratio 

    1000:1(Can be customized according to needs)

    input pressure

    100Kpa~500Kpa(Can be customized according to user needs)

    Usage environment

    temperature:-10℃~+50℃; Relative humidity:<80%RH(No condensation)

    Equipment pressure resistance 


    Working pressure difference range


    Working power supply

    110VAC~240VAC,50±0.5Hz,Built-in lithium battery can work for 20 hours